The ITF also confirmed an increase in funding, vowed more blood tests each season and more out of competition testing.

Last week Federer told CNN it was "naive" to think tennis is free of players who use drugs to enhance their performance and called on the sport's governing bodies to pour more funding into the fight against it.

Australian sport was also stunned by a government report which alleged many athletes were using illegal substances supplied by organized criminal groups.

On Thursday the National Rugby League became embroiled in scandal after Sydney-based club the Cronulla Sharks said they were assisting the Australian Sports Anti-Doping Authority after reports that up to 14 of their players could be using banned drugs.

"The implementation of the athlete biological passport is an important step in the evolution of the tennis anti-doping program as it provides us with a great tool in the fight against doping in our sport," said ITF President Francesco Ricci Bitti.

"We also hope to have increased support from the National Anti-Doping Agencies around the world who need to do their part if we are to win this battle and make our programme more effective.

"Our thanks to the Grand Slam tournaments, the ATP and WTA who have recognised the need to increase the investment of tennis in anti-doping and to the players who asked for more testing, especially blood testing, over the next few years."

The ITF's stance was backed by Stacey Allaster, the chief executive of the WTA Tour and her male counterpart from the ATP Tour Brad Drewett.

Drewett added: "The players have been clear that they support increased investment in anti-doping and we feel that this is the most effective way to show the world that tennis is a clean sport."